UltraPlot

UltraPlot is an object-oriented superset of matplotlib (a maintained fork of proplot supporting mpl 3.9+). Every matplotlib axes method still works; UltraPlot adds a unified .format() styling method, smarter subplots(), location-shortcut colorbars/legends, constructor functions, and auto-layout.

Most of UltraPlot is close enough to matplotlib that you can guess it. This skill documents the conventions and edges that are easy to get subtly wrong — all verified against ultraplot 2.3.

Core conventions (get these right first)